So, you think these Shepards were living/sleeping out in the fields during wintertime?
Of course. The average daily highs and lows in Jerusalem on December 25th is 55 F high and 43 F low. I live at the same latitude as Jerusalem in Texas and sheep are outside year around, expecially around Christmas when the weather is so nice.
Remember, Jerusalem isn't New York, Totonto, or Moscow.
Why is it important to you for you to need a direct command "in the way that Paul states to keep observing his death, until he arrives" regarding Christmas?
There is no direct command in the bible to observe wedding anniversaries in the bible. Yet, Jehovah's Witnesses celebrate wedding anniversaries while at the same time they hypocritically condemn others for doing the same thing regarding God's birthday?
You would agree that is pretty twisted right?